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论文编号：	1030
作者编号：	2120072367
上传时间：	2009/5/26 23:03:25
中文题目：	语义web环境下知识组织体系的研
英文题目：	Knowledge Organization System
指导老师：	刘玉照
中文关键字：	知识组织体系 简单知识组织体系<
英文关键字：	Knowledge Organization System
中文摘要：	语义Web环境下知识组织体系是指在语义网环境下对知识结构进行系统化的描述和语义说明，用于支持网络信息的表示与检索等活动，以实现逻辑推理为目标的知识组织体系。现在已经逐渐成为信息科学领域一个新的、重要的研究领域。 目前Web文档，大都以超文本标记语言HTML的形式标记和存储，缺乏语义描述和逻辑推理的能力，不能够满足现在信息组织的要求。而语义Web是当前Web的扩展，语义Web体系结构中的本体层是语义Web的核心，能够使人与机器、机器与机器之间更好地实现信息的共享与协作。为了利用叙词表转换本体，W3C相继提出了资源描述框架RDF、Web本体语言OWL、简单知识组织体系SKOS。SKOS是建立在RDF Schema基础上，扩展了RDF Schema的描述能力，提供了专门的标签描述和共享受控词表，是一种更为简单、易用的知识管理方案。 本文对两种知识组织体系——叙词表和本体进行了详细的比较，阐述了两者之间的区别与联系，两者间的共同特征表明叙词表完全可以进行转化构建本体，两者间的区别则决定了本体比叙词表在支持检索等方面有更好的性能。在上面的研究基础之上，本文通过本体构建工具protégé对AGROVOC中的叙词片段进行叙词到本体的构建。 本文引入W3C推荐的知识组织体系SKOS，SKOS的提出为叙词表到本体的转换研究提供了标准的知识组织体系框架。在SKOS标准之下，叙词表到本体的转换使用统一的标签、一致的描述，为转化之后的本体的重用和互操作创造了条件。另外本文对SKOS Core词表的常用标签进行简单介绍，并节取AGROVOC中的一段叙词片段，应用SKOS Core对此片段进行表示。
英文摘要：	Semantic Web Knowledge Organization System is a systematic and semantic description of knowledge structure in the Semantic Web environment, used for supporting the representation and retrieval of network information, in order to realize logical reasoning. It is becoming a new and important research field in information science. Web documents are mostly marked and saved in the form of HTML(Hyper Text Markup Language) at present time, it’s lack of semantic description and the ability of logical reasoning, so it isn’t able to meet the requirements of current information organization. Semantic Web is an extension of the current web, ontology layer is the core of semantic web in Semantic Web system, it’s able to make human being and machine、machine and machine achieve better information sharing and collaboration. In order to transform thesaurus to ontology, W3C has introduced RDF(Resource Description Framework)、OWL(Ontology Web Language)、SKOS(Simple Knowledge Organization System). SKOS bases on RDF Schema, and extends the descriptive ability of RDF Schema, it provides a specific label description and shares the controlled vocabulary, what’s more, SKOS is a simple、easy-to-use knowledge management program. In this paper, detailed comparison of two types of knowledge organization systems——Thesaurus and Ontology are to carry out, and explain the difference and contact between them. Common characteristics show that it can be converted from Thesaurus to Ontology, the differences determines Ontology in support of search than Thesaurus has better performance. Moreover, the author chooses one paragraph of AGROVOC, and constructs ontology with the ontology edition tool protégé. This paper introduces the knowledge organization system SKOS recommended by W3C as a standard in the transformation. Under the SKOS standard, unified labels and descriptions are used in the transformation, creating conditions for the reuse and interoperation of ontology after transformation. Then the paper simply introduces the common labels of SKOS Core Vocabulary. The author also chooses one paragraph of AGROVOC and expresses the Thesaurus using SKOS Core.
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